| 应用Hermit插值方法修正Dome-A自动气象站记录的雪层温度 |
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| 引用本文： | 叶玉芳,程晓,惠凤鸣.应用Hermit插值方法修正Dome-A自动气象站记录的雪层温度[J].北京师范大学学报(自然科学版),2011(4):419-423. |
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| 作者姓名： | 叶玉芳 程晓 惠凤鸣 |
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| 作者单位： | 北京师范大学全球变化与地球系统科学研究院;北京师范大学地理学与遥感科学学院; |
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| 基金项目： | 国家“863”计划重点项目(2008AA09Z117,2008AA121702-2) |
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| 摘 要： | 随着冰盖表面雪的积累或消融,自动气象站(AWS)上所携带的传感器相对于地表的高度/深度不断变化,给观测数据带来误差.本文利用分段三次Hermit插值的方法对Dome A地区的AWS历史雪层温度数据进行修正.结果表明,雪层的修正量随着雪的积累率的增加而增大,在夏半年为正,在冬半年为负.该方法对于浅层雪温的修正有较好的效果.
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| 关 键 词： | 自动气象站(AWS) 雪积累率 雪层温度 分段三次Hermit插值 |
CORRECTION OF FIRN TEMPERATURE DATA FROM AUTOMATIC WEATHER STATIONS BASED ON PIECEWISE CUBIC HERMIT INTERPOLATION AT DOME-A IN ANTARCTICA |
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| YE Yufang , CHENG Xiao HUI Fengming College of Global Change , Earth System Science,Beijing Normal University,Beijing,China, School of Geography,China.CORRECTION OF FIRN TEMPERATURE DATA FROM AUTOMATIC WEATHER STATIONS BASED ON PIECEWISE CUBIC HERMIT INTERPOLATION AT DOME-A IN ANTARCTICA[J].Journal of Beijing Normal University(Natural Science),2011(4):419-423. |
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| Authors: | YE Yufang CHENG Xiao HUI Fengming College of Global Change Earth System Science Beijing Normal University Beijing China School of Geography China |
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| Institution: | YE Yufang 1,2) CHENG Xiao 1) HUI Fengming 1)(1) College of Global Change and Earth System Science,Beijing Normal University,100875,Beijing,China,2) School of Geography,China) |
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| Abstract: | With snow accumulation or ablation,the height/depth of automatic weather station(AWS) sensors changes continually,leading to errors in measured data.In this study,piece-wise cubic Hermit interpolation was employed to correct firn temperature data from AWS at Dome-A.Data showed that correction level increased with accumulating snow thickness.Further,correction was positive in summer and negative in winter.It is concluded that this method is effective for correction of superficial firn temperature. |
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| Keywords: | automatic weather station(AWS) snow accumulation firn temperature piecewise cubic Hermit interpolation |
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